Robert Bosch Tool Corp., of Mount Prospect, Ill. voluntarily recalled about 9,700 Bosch Hammer Drills because the drill can continue to operate after the trigger has been released, posing a risk of injury to consumers. The recalled hammer drill is blue with "BOSCH" printed on the side. The model number 1191VSR can be located on the product nameplate mounted on the side of the motor. The product's packaging will be marked as 1191VSRK (the "K" indicates that the hammer drill was packaged with a case in a kit). Only drills with a serial number that begins with "7" are included in the recall.The products were sold at Menards and other hardware retailers and industrial distributors nationwide from July 2007 through April 2008 for about $100.